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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This file includes all the necessary GL headers and implements some useful
// utilities.
#ifndef GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
#define GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
#include "build/build_config.h"
#include "ui/gfx/gl/gl_bindings.h"
// GLES2 defines not part of Desktop GL
// Shader Precision-Specified Types
#define GL_LOW_FLOAT 0x8DF0
#define GL_MEDIUM_FLOAT 0x8DF1
#define GL_HIGH_FLOAT 0x8DF2
#define GL_LOW_INT 0x8DF3
#define GL_MEDIUM_INT 0x8DF4
#define GL_HIGH_INT 0x8DF5
#define GL_IMPLEMENTATION_COLOR_READ_TYPE 0x8B9A
#define GL_IMPLEMENTATION_COLOR_READ_FORMAT 0x8B9B
#define GL_MAX_FRAGMENT_UNIFORM_VECTORS 0x8DFD
#define GL_MAX_VERTEX_UNIFORM_VECTORS 0x8DFB
#define GL_MAX_VARYING_VECTORS 0x8DFC
#define GL_SHADER_BINARY_FORMATS 0x8DF8
#define GL_NUM_SHADER_BINARY_FORMATS 0x8DF9
#define GL_SHADER_COMPILER 0x8DFA
#define GL_RGB565 0x8D62
#define GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES 0x8B8B
#define GL_RGB8_OES 0x8051
#define GL_RGBA8_OES 0x8058
#define GL_HALF_FLOAT_OES 0x8D61
// GL_OES_EGL_image_external
#define GL_TEXTURE_EXTERNAL_OES 0x8D65
#define GL_SAMPLER_EXTERNAL_OES 0x8D66
#define GL_TEXTURE_BINDING_EXTERNAL_OES 0x8D67
#define GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES 0x8D68
// GL_ANGLE_translated_shader_source
#define GL_TRANSLATED_SHADER_SOURCE_LENGTH_ANGLE 0x93A0
// GL_CHROMIUM_flipy
#define GL_UNPACK_FLIP_Y_CHROMIUM 0x9240
#define GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM 0x9241
#define GL_UNPACK_COLORSPACE_CONVERSION_CHROMIUM 0x9243
// GL_ANGLE_pack_reverse_row_order
#define GL_PACK_REVERSE_ROW_ORDER_ANGLE 0x93A4
// GL_ANGLE_texture_usage
#define GL_TEXTURE_USAGE_ANGLE 0x93A2
#define GL_FRAMEBUFFER_ATTACHMENT_ANGLE 0x93A3
// GL_EXT_texture_storage
#define GL_TEXTURE_IMMUTABLE_FORMAT_EXT 0x912F
#define GL_ALPHA8_EXT 0x803C
#define GL_LUMINANCE8_EXT 0x8040
#define GL_LUMINANCE8_ALPHA8_EXT 0x8045
#define GL_RGBA32F_EXT 0x8814
#define GL_RGB32F_EXT 0x8815
#define GL_ALPHA32F_EXT 0x8816
#define GL_LUMINANCE32F_EXT 0x8818
#define GL_LUMINANCE_ALPHA32F_EXT 0x8819
#define GL_RGBA16F_EXT 0x881A
#define GL_RGB16F_EXT 0x881B
#define GL_ALPHA16F_EXT 0x881C
#define GL_LUMINANCE16F_EXT 0x881E
#define GL_LUMINANCE_ALPHA16F_EXT 0x881F
#define GL_BGRA8_EXT 0x93A1
// GL_ANGLE_instanced_arrays
#define GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE 0x88FE
// GL_EXT_occlusion_query_boolean
#define GL_ANY_SAMPLES_PASSED_EXT 0x8C2F
#define GL_ANY_SAMPLES_PASSED_CONSERVATIVE_EXT 0x8D6A
#define GL_CURRENT_QUERY_EXT 0x8865
#define GL_QUERY_RESULT_EXT 0x8866
#define GL_QUERY_RESULT_AVAILABLE_EXT 0x8867
// GL_CHROMIUM_command_buffer_query
#define GL_COMMANDS_ISSUED_CHROMIUM 0x84F2
#define GL_GLEXT_PROTOTYPES 1
// Define this for extra GL error debugging (slower).
// #define GL_ERROR_DEBUGGING
#ifdef GL_ERROR_DEBUGGING
#define CHECK_GL_ERROR() do { \
GLenum gl_error = glGetError(); \
LOG_IF(ERROR, gl_error != GL_NO_ERROR) << "GL Error :" << gl_error; \
} while (0)
#else // GL_ERROR_DEBUGGING
#define CHECK_GL_ERROR() void(0)
#endif // GL_ERROR_DEBUGGING
#endif // GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
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